diff --git a/build.gradle b/build.gradle
index dfb3b7afc1..1b9f60da18 100644
--- a/build.gradle
+++ b/build.gradle
@@ -42,7 +42,7 @@ configure(allprojects) { project ->
 	ext.hsqldbVersion        = "2.3.2"
 	ext.httpclientVersion    = "4.4"
 	ext.httpasyncVersion     = "4.0.2"
-	ext.jackson2Version      = "2.5.1"
+	ext.jackson2Version      = "2.5.2"
 	ext.jasperreportsVersion = "6.0.3"
 	ext.jettyVersion         = "9.2.10.v20150310"
 	ext.jodaVersion          = "2.7"
@@ -51,14 +51,14 @@ configure(allprojects) { project ->
 	ext.nettyVersion         = "4.0.26.Final"
 	ext.openjpaVersion       = "2.2.2"  // 2.3.0 not Java 8 compatible (based on ASM 4)
 	ext.protobufVersion      = "2.6.1"
-	ext.reactorVersion       = "1.1.5.RELEASE"
-	ext.slf4jVersion         = "1.7.10"
+	ext.reactorVersion       = "1.1.6.RELEASE"
+	ext.slf4jVersion         = "1.7.11"
 	ext.snakeyamlVersion     = "1.15"
 	ext.snifferVersion       = "1.14"
 	ext.testngVersion        = "6.8.21"
 	ext.tiles2Version        = "2.2.2"
 	ext.tiles3Version        = "3.0.5"
-	ext.tomcatVersion        = "8.0.20"
+	ext.tomcatVersion        = "8.0.21"
 	ext.tyrusVersion         = "1.3.5"  // constrained by WebLogic 12.1.3 support
 	ext.undertowVersion      = "1.1.3.Final"
 	ext.woodstoxVersion      = "4.4.1"